Multiple drilling-machine.



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APPLICATION FILED IEB.7. 1906.

f 2 SHEETS-SHEET 2.

film/ze@ FRANK E. BOGORSELSKI, OF SPRINGFIELD, MASSACHUSETTS.

MULTIPLE DRIILING-MACHINE.

Specification of Letters Patent.

Patented Jan. 7', 1908.

Application filed I'ebrnarv 7. 1906. Serial No. 299,904.

T 0 all whom it may concern:

Be it known that I, FRANK E. Booons'EL- SKI, a citizen of the UnitedStates of America, and resident of Springfield, in the county ofI-Iampden and State of Massachusetts, have invented certain new anduseful Improve ments in Multiple Drilling Machines, of which thefollowing is a full, clear, and exact description.

This invention relates to improvements in multiple spindle drillingmachines in which the drill spindles are arranged on parallel axes andfor individual or independent adjustments thereof.

The invention pertains more particularlyr to means for effecting theadjustment of the parts of the machine which carry the drill spindles gand also to improved means for the confinement of the spindle carryingparts in their adjusted positions.

The invention consists in combinations and arrangements of parts and theconstruction of certain of the parts all substantially as hereinafterfully described and set forth in the claims.

In the drawings,-Figure 1 is a side elevation of so much of a multiplespindle drilling machine as includes and shows the connection foroperation thereon of the present improvements, a portion of the spindlecarrying ead being in vertical section. Fig. 2 is a plan view of afragment of the head and showing the relation thereto of one of thedrill spindle carrying arms and the mechanical adjusting means therefor.Fig. 3 is a sectional view on a vertical plane as taken on line 3 3,Fig. 2. The section line 22 on Fig. 3 indicates the plane below whichare the parts shown in Fig. 2.

SimilarI characters of reference indicate corres ending parts in all ofthe views.

In t e drawings,-A represents the standard or upright of the drillingmachine on which the head B has a vertical movement as imparted by thefeed screw C.

The head carries a plurality of arms D D which in turn carry, journaledvertically therein, the s indlesor holders a a for the drills suitab edriving connections as common, and comprising gearing, telescopic shaftsand universal joints, being provided for rotating the drill spindles inwhatever positions of adjustment the latter may have.

The head B comprises upper and lower separated 4circular or annularportions b and c rigidly connected by distance blocks orr studs 9 atsuitable intervals, and as is usual.

The upper circular portion b is constructed with a circularly arrangedseries of downwardly open sockets d within its under face; a serios ofstuds f having upper end headsl() being vlitted within said sockets anddepending therebelow and through apertures 12 in the lower circularportion c of the he'ad. Threaded bushings e are provided surrounding thestuds adjacent the heads thereof and having screw engagement in saidsockets for holding the studs 1n axially fixed positions, but leavingthe studs free for rotary or swiveling movements on their respectiveaxes.

It will` be noted that these axes are fixed axes, since the sockets dare independent, as distinguished, for instance, from mere portions of`a continuous annular groove along which the heads of the studs would befree to travel.

The drill carrying arms having truly or approximately radialarrangements relatively to the circular portions of the head and holdingthe drill spindles, are located between the said circular head portionsl and c, are longitudinally slotted. as shown at g and e1n-A brace andare capable of inward and outward sliding engagemeiits relatively to theaforementioned. studs, and are also capable of swiveling movements onsaid studs.

G G represents threaded shafts or screws individually appurtenant to therespective spindle carrying arms, and as shown each screw shaft isjournaled for rotation through the endv portion of one of the arms atthe outer boundary of the slot g and is held against endwise movementrelatively to the arm by the shoulder 11, and collar 13, and the outerend of the shaft is made square, as indicated at 14, for receiving theengagement thereon of a wrench crank l1..

Each of the adjusting screws g penetrates transversely, with a screwengagement, as indicated at 15, through an intermediate portion of theswivel stud j.

Vithin the apertures 12 in the lower circular portions c of thehead,-and through which apertures the lower extremities of the studs y"are extendedfare fitted washers c' (Fig. 3), the same embracing thestuds and having bearing against the under sides or edges of the slottedarms D; and the screw threadedlower end portions of the studs receivingthe clamping nuts c in Fig. 3 indicates a lubricating shell of commonkind applied for supplying oil be tween the head of the stud and thesocket in which it is engaged for rotation.

fm, Fig. 3, represents the set screw 'for preventing the loosening ofthe threaded bushing e.

The part n of the arm having the socket or journal o is made adjustablerelatively to the arm proper having a rib and groove engagementtherewith as represented at 7) in Fig. 2 and confined by bolts g passedthrough a slot 7^ in the one part and screw engaging in tapped holestherefor in the other part of the arm. y

By loosening the binding nut j for a given drill carrying arm, the armis freed between the upper and lower circular portions b and c of thehead, and the arm and its appurtenances may have rocking movements in ahorizontal plane so as to be truly radial of the head or more or lessinclined from the true radial line, as, for instance, on the lines suchas represented at u and Q7, Fig. 2, the studf being in a sense unitarywith the arm; and by turning the adjusting screw g in the properdirection, the arm may have an inward or an outward movement relativelyto the stud 'for positioning the drill spindle at any point, suitablydistant as desired, from the center of the head.

It will be apparent that each arm may be quickly adjusted to a nicety,and the adjustment will be maintained without the liability of anychanging thereof in the time intervening between the positioning of thearm and the final clamping thereof by the nut y'.

In the foregoing description the improved devices have been describedprecisely as constructed for a vertical multiple parallel spindledrilling machine, but, of course, the same are equally well applicableon a machine in which the head is, or may be carried axially horizontal,and such terms in the foregoing description as upper, lower and under,vertical and horizontal are used in their relative sense, it beingapparent that complete or partial inversion in the arrangements of theparts may be practiced in a manifest manner without fundaseries of studshaving connections with one of said portions of the head and projectingthrough and beyond apertures which are provided therefor in the otherhead portion, of a series of longitudinally slotted drill supportn ingarms located between said separated circular portions of the head andhaving sliding engagements about said studs, washers fitted about thestuds in said apertures of the one of said circular head portions, andadapted to engage with the several arms, and nuts, screw threading onthe extremities of the studs, against said washers, and for crowding thearms to be bound against the stud carry ing circular portion of thehead.

2. ln a multiple drilling machine, the combination with a head made witha circular portion having series of independent sockets within its underside, a series of studs having heads which are fitted rotatably withinsaid sockets, and depend therebelow, and threaded bushings surroundingsaid studs adjacent their heads and screw engaged in said sockets, beingadapted to sustain said studs and to permit rotation thereof, of aseries of longitudinally slotted drill supporting arms located belowsaid circular portion of the head and having sliding engagement on saidstuds, and means connecting the arms with the studs to rotate therewith.

3. In a multiple drilling machine, the combination with a circular head,having a plurality of independent sockets, studs mounted in said socketsfor rotation but not for trans-Q lation, and a plurality of drillsupporting arms connected with saidistuds for longitudinal adjustmentthereon and also to swing therewith into and out of radial position withreference to the head.

Signed by me at Springlield, Mass., in presence of two subscribingwitnesses.

FRANK E. BOCORSELSKI.

l/Vitnesses:

G. R. DRrscoLL, WM. S. BELLows.

